SERVICE MANUAL INVEST HEAT PUMP DC INVERTER SPLIT WALL-MOUNTED TYPE MSC-24/QD FP MSH-24/QD FP V1.0 Nov, 2009
CONTENTS 1. Precaution... 1 1.1 Safety Precaution...1 1.2 Warning... 1 2. Function... 4 3. Dimension... 6 3.1 Indoor Unit... 6 3.2 Outdoor Unit... 7 4. Specification... 8 5. Refrigerant cycle diagram... 9 6. Wiring diagram... 10 6.1 Indoor Unit... 10 6.2 Outdoor Unit... 11 7. Installation details... 12 7.1 Wrench torque sheet for installation... 12 7.2 Connecting the cables... 12 7.3 Pipe length and the elevation... 12 7.4 Air purging of the piping and indoor unit... 12 7.5 Pumping down (Re-installation)... 14 7.6 Re-air purging (Re-installation)... 15 7.7 Balance refrigerant of the 2-way, 3-way valves... 16 7.8 Evacuation... 17 7.9 Gas charging... 18 8. Electronic function... 19 8.1 Abbreviation... 19 8.2 Display function... 19 8.3 Protection... Fel! Bokmärket är inte definierat. 8.4 Fan-Only Mode... Fel! Bokmärket är inte definierat. 8.5 Cooling Mode... Fel! Bokmärket är inte definierat. 8.6 Drying mode... Fel! Bokmärket är inte definierat. 8.7 Heating mode... Fel! Bokmärket är inte definierat. 8.8 Auto mode function... Fel! Bokmärket är inte definierat. 8.9 Forced operation function... Fel! Bokmärket är inte definierat. 8.10 Action of 4-way valve... Fel! Bokmärket är inte definierat. 8.11 Two speeds outdoor fan function... Fel! Bokmärket är inte definierat. 8.12 Timer function... Fel! Bokmärket är inte definierat. 8.13 Sleep function mode... Fel! Bokmärket är inte definierat. 8.14 Auto-Restart function... Fel! Bokmärket är inte definierat. 8.15 Ionizer function(optional)... Fel! Bokmärket är inte definierat. 9. Troubleshooting... 28 9.1 Indoor Unit Error Display... 29 9.2 Diagnosis and Solution... 30 9.3 Key parts checking.... 33
1. Precaution 1.1 Safety Precaution To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. Before service unit, be sure to read this service manual at first. 1.2 Warning Installation Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit. There is risk of fire or electric shock. For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service center. Do not disassemble or repair the product, there is risk of fire or electric shock. Always ground the product. There is risk of fire or electric shock. Install the panel and the cover of control box securely. There is risk of fire of electric shock. Always install a dedicated circuit and breaker. Improper wiring or installation may cause fore or electric shock. Use the correctly rated breaker of fuse. There is risk of fire or electric shock. Do not modify or extend the power cable. There is risk of fire or electric shock. Do not install, remove, or reinstall the unit by yourself (customer). There is risk of fire, electric shock, explosion, or injury. Be caution when unpacking and installing the product. Sharp edges could cause injury, be especially careful of the case edges and the fins on the condenser and evaporator. For installation, always contact the dealer or an Authorized service center. There is risk of fire, electric shock, explosion, or injury. Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product. Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury. Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open. Moisture may condense and wet or damage furniture. Take care to ensure that power cable could not be pulled out or damaged during operation. There is risk of fire or electric shock. Do not place anything on the power cable. There is risk of fire or electric shock. Do not plug or unplug the power supply plug during operation. There is risk of fire or electric shock. Do not touch (operation) the product with wet hands. There is risk of fire or electric shock. Do not place a heater or other appliance near the power cable. There is risk of fire and electric shock. Do not allow water to run into electric parts. It may cause fire, failure of the product, or electric shock. Do not store or use flammable gas or combustible near the product. There is risk of fire or failure of product. Do not use the product in a tightly closed space for a long time. Oxygen deficiency could occur. When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on. Do not use the telephone or turn switches on or off. There is risk of explosion or fire. If strange sounds, or small or 1
smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire. Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives. There is risk of property damage, failure of product, or electric shock. Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure. When the product is soaked (flooded or submerged), contact an Authorized service center. There is risk of fire or electric shock. Be caution that water could not enter the product. There is risk of fire, electric shock, or product damage. Ventilate the product from time to time when operating it together with a stove, etc. There is risk of fire or electric shock. Turn the main power off when cleaning or maintaining the product. There is risk of electric shock. When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker. There is risk of product damage or failure, or unintended operation. Take care to ensure that nobody could step on or fall onto the outdoor unit. This could result in personal injury and product damage. CAUTION Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product. Install the drain hose to ensure that water is drained away properly. A bad connection may cause water leakage. Keep level even when installing the product. To avoid vibration of water leakage. Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors. Use two or more people to lift and transport the product. Avoid personal injury. Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. Operational Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft). This could harm to your health. Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigerant system. There is risk of damage or loss of property. Do not block the inlet or outlet of air flow. It may cause product failure. Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. There is risk of fire, electric shock, or damage to the plastic parts of the product. Do not touch the metal parts of the product when removing the air filter. They are very sharp. There is risk of personal injury. Do not step on pr put anything on the product. (outdoor units) There is risk of personal injury and failure of product. Always insert the filter securely. Clean the filter every two weeks or more often if necessary. A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage. Do not insert hands or other object through air inlet or outlet while the product is operated. 2
There are sharp and moving parts that could cause personal injury. from the product. Do not drink the water drained It is not sanitary could cause serious health issues. Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury. Replace the all batteries in the remote control with new ones of the same type. Do not mix old and mew batteries or different types of batteries. There is risk of fire or explosion. Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire. They may burn of explode. If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote of the batteries have leaked. The chemical in batteries could cause burns or other health hazards 3
2. Function Indoor unit Operation by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance with the setting temperature. Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Restarting is for approx. 3 minutes.. Indoor fan speed control Turbo wind, high, med, low, breeze. Ionizer (Optional) Two-direction air vane The unit will decide the louver direction according to operation mode. Timer function Sleep mode auto control The fan is turn to low speed (cooling/heating). The unit will be turn off at the seventh hour. Independent dehumidification The function is usually used in rainy days in springtime or damp areas. Air flow Direction control The louver can be set at the desired position or swing up and down automatically Auto mode The mode can be change by the room temperature. Temp. Compensation Self-diag. function Anti-cold function Prevent the cold wind at the beginning of unit start. Auto defrost Auto-restart function When the power supply is interrupted and then restore, the air conditioners automatically restore the previous function setting. Flexible wiring connection 4
Outdoor unit Power relay control The unit has 3 mins delay between continuously ON/OFF operations. Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly. Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation. Anti-rust cabinet Made from electrolytic zinc steel sheet and anti-rust coated components. Valve protection cover It protects the valves and prevents water from dripping. Discharge pipe temperature protect Driving heating at -15 5
3. Dimension 3.1 Indoor Unit MSC-24/QD FP MSH-24/QD FP 6
MSC-24/QD FP 3.2 Outdoor Unit 7
4. Specification Indoor MSC-24/QD FP MSH-24/QD FP Outdoor MSC-24/QD FP MSC-24/QD FP Power supply P 1,220-240V~,50Hz 1,220-240V~,50Hz Capacity B 23000(12000~250 23000(12000~250 Cooling Input W 1970(820~2500) 1970(820~2500) Rated current A 8.9(3.6~11.2) 8.9(3.6~11.2) EER W 3.42 3.42 Capacity B 26500(12000~280 26500(12000~280 Heating Input W 2090(820~2800) 2090(820~2800) Rated current A 9.3(3.6~12.5) 9.3(3.6~12.5) COP W 3.72 3.72 Moisture Removal L 2.4 2.4 Max. input consumption W 2950 2950 Max. current A 13.5 13.5 Starting current A 12 12 or motor fan motor unit t piping Model DA150S1C-20FZ DA150S1C-20FZ Type Twin-rotary DC inverter Twin-rotary DC inverter Brand Toshiba Toshiba Compress Capacity B 15286 15286 Input W 1150 1150 Rated A 9.7 9.7 Thermal protector KSD301 KSD301 Capacitor u No No Refrigerant oil m 500 500 Model YDK36-4C(A) YDK36-4C(A) Indoor fan Brand Welling Welling Input W 72/70/54/50 72/70/54/50 Capacitor u 3 3 Speed(hi/mi/lo) r 1260/1210/1020/950 1260/1210/1020/950 Indoor air flow (Hi/Mi/Lo) m 1150/1080/960 1150/1080/960 Indoor noise level (Hi/Mi/Lo) d 48/45/41 48/45/41 Dimension m 1080*330*225 1080*330*235 Indoor unit Packing m 1165*445*320 1165*445*320 Net/Gross weight K 15.5/20.5 15.5/20.5 Model YDK53-6N YDK53-6N Outdoor Brand Welling Welling Input W 144/102 144/102 Capacitor u 2.5 2.5 Speed r 780/600 780/600 Outdoor air flow m 3000/2200 3000/2200 Outdoor noise level d 58 58 Outdoor Dimension(W*H* m 895*860*330 895*860*330 Packing m 1043*915*395 1043*915*395 Net/Gross weight K 63.5/67.5 63.5/67.5 Refrigerant type R410A g 1900 1900 Refrigeran Liquid side/ Gas m Ф9.52/Ф16.0 Ф9.52/Ф16.0 Max. refrigerant m 25 25 Max. difference in m 10 10 Operation temp 17 ~ 30 17 ~ 30 Ambient temp in cooling mode 0 ~ 50 0 ~ 50 Ambient temp in heating mode -15 ~ 34-15 ~ 34 The above design and specifications are subject to change without prior notice for product improvement. 8
5. Refrigerant cycle diagram 9
6. Wiring diagram 6.1 Indoor Unit MSC-24/QD FP MSH-24/QD FP 10
6.2 Outdoor Unit MSC-24/QD FP 11
7. Installation details 7.1 Wrench torque sheet for installation Outside diameter Torque mm inch Kgf.m Ф9.52 3/8 4.2 Ф16.0 5/8 6.6 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit 9K 12K 18K 24K mm 2 1.5 1.5 2.5 2.5 7.3 Pipe length and the elevation Capacity Pipe size Btu/h Gas Liquid Standard length (m) Max. Elevation B (m) Max. Length A (m) Additional refrigerant (g/m) 24K 5/8 (Ф16.0) 3/8 (Ф9.52) 5 10 25 40 Caution: Capacity is based on standard length and maximum allowance length is base of reliability. Oil trap should be installed per 5-7 meters. 7.4 Air purging of the piping and indoor unit Required tools: Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector. Note: The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit. Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it prevents 12
the gas leakage from the refrigeration cycle. Procedure 1. Recheck the piping connections. 2. Open the valve stem of the 2-way valve counterclockwise approximately 90, wait 10 seconds, and then set it to closed position. Be sure to use a hexagonal wrench to operate the valve stem. 3. Check for gas leakage. Check the flare connection for gas leakage 4. Purge the air from the system. Set the 2-way valve to the open position and remove the cap from the 3-way valve s service port. Using the hexagonal wrench to press the valve core pin, discharge for three seconds and then wait for one minute. 5. Use torque wrench to tighten the service port cap to a torque of 1.8 kgf.m. (18N.m) 6. Set the 3-way valve to the opened position. 7. Mounted the valve stem nuts to the 2-way and 3-way valves. 8. Check for gas leakage. At this time, especially check for gas leakage from the 2-way and 3-way stem nuts, and from the service port. Caution: If gas leakage is discovered in step (3) above, take the following measures. If the leaks stop when the piping connections are tightened further, continue working from step (4). If the gas leaks do not stop when the connections are retightened, repair the location of the leak, discharge all of the gas through the service port, and then recharge with the specified amount of gas from a gas cylinder. 13
7.5 Pumping down (Re-installation) Procedure 1. Confirm that both the 2-way and 3-way valves are set to the opened position. Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems. 2. Operate the unit for 10 to 15 minutes. 3. Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way valve. Connect the charge hose with the push pin to the gas service port. 5. Air purging of the charge hose. Open the low-pressure valve on the charge set slightly to purge air from the charge hose. 6. Set the 2-way valve to the close position. 7. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa. 8. Immediately set the 3-way valve to the closed position. Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and amount the 2-way and 3-way valve s stem nuts and service port caps. Use a torque wrench to tighten the service port cap to a torque of 1.8 kgf.m. Be sure to check for gas leakage. 14
7.6 Re-air purging (Re-installation) Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the closed position. 2. Connect the charge set and a charging cylinder to the service port of the 3-way valve. Leave the valve on the charging cylinder closed. 3. Air purging. Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the 2-way valve approximately 45 for 3 seconds then closing it for 1 minute; repeat 3 times. After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve. 4. Check the gas leakage. Check the flare connections for gas leakage. 5. Discharge the refrigerant. Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicates 0.3 to 0.5 Mpa. 6. Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position. Be sure to use a hexagonal wrench to operate the valve stems. 7. Mount the valve stems nuts and the service port cap. Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m. Be sure to check the gas leakage. 15
7.7 Balance refrigerant of the 2-way, 3-way valves Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the open position. 2. Connect the charge set to the 3-way valve s service port. Leave the valve on the charge set closed. Connect the charge hose with the push pin to the service port. 3. Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge indicates 0.05 to 0.1Mpa. If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is higher than 0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa. If this is the case, it will not be necessary to apply a evacuation. Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil sill be discharged. 16
7.8 Evacuation Procedure: 1. Connect the vacuum pump to the charge set s centre hose. 2. Evacuation for approximately one hour. Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmhg) [vacuum of 4 mmhg or less]. 3. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump). 4. Disconnect the charge hose from the vacuum pump. Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle. 17
7.9 Gas charging Procedure: 1. Connect the charge hose to the charging cylinder. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. 2. Purge the air from the charge hose. Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant). 3. Open the valves (Low side) on the charge set and charge the system with liquid refrigerant. If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little at a time (approximately 150g each time0 while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure.(pumping down-pin). 4. Immediately disconnect the charge hose from the 3-way valve s service port. Stopping partway will allow the refrigerant to be discharged. If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air conditioner before disconnecting the hose. 5. Mounted the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. 18
8 Electronic function 8.1 Abbreviation T1: Indoor ambient temperature T2: Pipe temperature of indoor heat exchanger T3: Pipe temperature of outdoor heat exchanger T4: Outdoor ambient temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. MSC-24/QD FP MSH-24/QD FP Auto indicator This indicator illuminates when the air conditioner is in AUTO operation. Timer indicator This indicator illuminates when TIMER is set ON/OFF. PRE.-DEF. Indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode. TEMPERATURE indicator Usually it displays the temperature settings. When change the setting temperature, this indicator begins to flash, and stops 20 seconds later. It displays the room temperature when the air conditioner is in FAN only operation, and the range of that is 0~50. When the unit stops operation, it returns to original factory settings. Displays the malfunction code or protection code. Frequency indicator This indicator appears only when the compressor is in operation and indicates the current operating frequency. 19
8.2.2 LED display control function. Pressing LED display button on remote controller will turn off all displays on indoor unit, while pressing once again, all displays will resume. 8.3 Protection 8.3.1 Protection of compressor top temperature. When the Over-load Protector is cut due to too high temperature of compressor top, the unit will stop. When the Over-load Protector is closed again due to decreasing of compressor top temperature, the unit will restart( in this case the compressor is restricted by Three Minutes Delay protection). 8.3.2 Protection of discharge temperature (Td). 1) Compressor will stop immediately if Td>115 for 5s. 2) If 90 Td 115, compressor will run with restricted frequency. 3) If Td<90, compressor will restart or run without restricted frequency 8.3.3 Three Minutes Delay at restart for compressor. It will take 3 minutes every time when compressor starts. It will take only 1 minute when the unit is powered on at first time. 8.3.4 Temperature sensor protection at open circuit or short circuit. 8.3.5 Inverter module Protection. Inverter module has a protection function against current, voltage and temperature. If these protections happened, the unit will stop and LED display error code. 8.3.6 Indoor fan delayed open function. When the unit is turned on at all modes, the indoor fan will operate 10 seconds later than the action of louver. 8.3.7 Compressor preheating function. 1) Preheating permitting condition: If T4(outdoor ambient temperature)3 and the machine connects to power supply newly or if T4 3 and compressor has stopped for over 3 hours, the compressor heating cable will work. 2) Preheating mode: A weak current flows through the coil of compressor from the wiring terminal of compressor, then the compressor is heated without operation. 3) Preheating release condition: If T45 or user turns on the machine and compressor runs, preheating function will stop. 8.3.8 Compressor heating cable If outdoor temperature is lower than 5, the compressor heating cable begins to work. If outdoor temperature is higher than 15, the compressor heating cable stops working. 8.4 Fan-Only Mode 8.4.1 Temperature setting function is disabled, and no setting temperature display. 8.4.2 In this mode, the action of louver is the same as in cooling mode. 8.4.3 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24 setting temperature. high 3.5 T1 24 3.0 medium 1.5 1.0 low 20
8.5 Cooling Mode 8.5.1 After starting, the operation frequency of compressor submits to following rule. ΔT=(room temp) (setting Temp) 1.5 1.0 0.5-0.5-1.0 A B C D -2. When the machine is running and ΔT(=room temp. setting temp.) changes, the frequency of compressor will rise or descend a grade (7 minutes after starting). After starting, if ΔT stays in a zone for 3 minutes, the frequency will change as follow: Zone A : Current frequency rise a grade till the maximum grade F8. Zone B: Keep the current frequency of compressor. Zone C: Descend the current frequency of compressor until F1. Zone D: Compressor stops after running as the minimum frequency F1 for 60 minutes or ΔT is less than 8.5.2 Indoor heat exchanger anti-freezing function. If T2 is lower than 0, the compressor stops and resumes when T2>5. 8.5.3 Outdoor unit current control in cooling mode(refer to the parameter table) outdoor unit current I3COOL I2COOL I1COOL comp. pause freq. descends if curr. rises; freq. remains if curr. descends running normally 8.5.4 Rating capacity test function 1) Set the indoor unit with remote controller as: high fan, 17 in cooling mode, then press TURBO button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a di sound for 2 seconds continuously. Also, indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode. 21
speed or 2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan setting temperature. 8.5.5 Turbo function(press the TURBO button on remote controller) 1) Elevate current frequency to a higher grade. 2) Indoor fan turns to turbo speed. 3) After running for 30 minutes the machine will turn back to previous setting mode. 8.5. 6 Indoor fan operation rule. medium, low and auto. 1) In cooling mode, indoor fan runs all the time and the speed can be selected as high, 2) Auto fan in cooling mode acts as follow: T=(oom temp) (setting Temp) Δ 4.0 3.0 1.5 1.0 high medium low 8.5.7 52. Condenser high temperature protection function(in cooling and drying mode) If T360 for 5 seconds, compressor will stop immediately, and the machine will not resume until T3 8.6 Drying mode 8.6.1 Indoor fan speed is fixed at breeze grade and can t be changed. The horizontal angle is the same as in cooling mode. 8.6.2 Room overlow temperature protection In drying mode, if room temperature is lower than 10, compressor will stop and not resume until room temperature climbs up to 12. 8.6.3 Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are valid, and they are the same as that in cooling mode. 8.6.4 Horizontal louver action is the same as that in cooling mode. 8.7 Heating mode 8.7.1 Indoor fan action: 1) Anti-cold-wind function. 22
2) If the compressor stops caused by room temperature rising, indoor fan will be forced to run 127 seconds with breeze. During this period, anti-cold-wind is disabled. After this, anti-cold wind function is available. 3) If the machine runs in rating capacity test mode, indoor fan runs with rating speed, and anti-cold-wind is disabled. 8.7.2 Indoor fan speed can be set as high, medium, low or auto grade, but anti-cold-wind function is preferential. Auto fan action in heating mode. ΔT=(oom temp) (setting Temp) 2.5 2.0 1.5 1.0 low medium high 8.7.3 After start the operation frequency of compressor submits to following rule: ΔTh=(room temp) (setting Temp) 5.0 4.5 3.5 3.0 2.5 D C B A When the machine runs, if ΔTh stays in a zone for 3 minutes, action of frequency is as follow: Zone A: Elevate the current frequency one grade, and not stop until the maximum grade. Zone B: Keep the current frequency. Zone C: Descend the current frequency one grade. Zone D: Compressor stops after running with F1 for 60 minutes or when ΔTh6. 23
8.7.4 Outdoor unit current control in heating mode. outdoor unit current I3HEAT I2HEAT I1HEAT comp. pause freq. descends if curr. rises; freq. remains if curr. descends running normally 8.7.5 Indoor heat exchanger high temperature protection. If T260, the compressor will stop and not resume until T248. 9.7. 6 Defrosting mode 1) Condition of defrosting. Condition 1: If T40, When the units are running, if the following two items are satisfied the units start defrosting: a) The units runs with T33 for 40 minutes and T3 keeps lower than -6 for more than 3 minutes. b) The units runs with T33 for 80 minutes and T3 keeps lower than -4 for more than 3 minutes. Condition 2: If T40, The program judges according to the condition 1, if the two items are satisfied, then judges if T2 has descended for more than 5, if it has the machine starts defrosting, or continues to judge T2 and will not defrost until T2 drops more than 5. Condition 3: No matter what value T4 is, if the machine runs with T33 for more than 120 minutes and T3 keeps lower than -2 for more than 3 minutes, the machine will defrost, no matter if T2 drops for more than 5 or not. 2) Condition of ending defrosting. If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating mode. a) T3 rises to be higher than 12. b) T3 rises to be higher than 8 and remains for 80 seconds. c) The machine has run for 10 minutes in defrosting. 8.7.7 Defrosting action 24
F8 compressor on off 4-way valve on off outdoor fan on off indoor fan on off indoor fan breeze 10s 90s 100s no longer than 10 minutes 30s 8.7.8 Rating capacity test function 1) Set the indoor unit with remote controller as: high fan, 30 in heating mode, then press TURBO button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a di sound for 2 seconds continuously. Also, indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode. 2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature. 8.7.9 Turbo function in heating mode Elevate current frequency(excluding F8) to a higher grade. If indoor fan is in low speed or pause caused by defrosting or anti-cold-winbeen released. 1) Indoor fan changes to turbo speed and anti-cold-wind function is valid. function, frequency of compressor will not be elevated one grade until these limit has 2) After running for 30 minutes the machine will turn back to previous setting mode. 17~30. 8.8 Auto mode function 8.8.1 This mode can be chosen with remote controller and the setting temperature can be changed between In auto mode, the machine will choos e cooling, heating or fan-only mode according to ΔT(ΔT =T1-Ts). Δ T=T1-Ts Running mode ΔT1-1 ΔT 1 ΔT-1 Cooling Fan-only Heating 8.8.2 Indoor fan will choose auto speed of relevant mode. 8.8.3 If the machine switches mode between heating and cooling, compressor will keep stopping for 15 minutes and then 25
rechoose mode according to ΔT. 8.8.4 If the setting temperature is modified, the machine will rechoose running function. 8.9 Forced operation function 8.9. 1 Forced cooling and auto function can carry out with a touch button. In these two modes, the machine can be changed by remote controller to any other mode at any moment. 8.9. 2 When the machine is off, pressing the touch button once, the unit will enter forced auto mode. When the machine is off, pressing the touch button twice within 5s, the unit will enter forced cooling mode. When the unit is running at forced auto or forced cooling mode, pressing the touch button continuously, the unit will be turned off. 8.9.3 In forced operation mode, all general protections is available. 8.9. 4 In forced cooling mode, the unit will run with fixed frequency F2 at low speed. 30 minutes later, the unit will turn to normal auto mode with setting temperature 24. 8.9.5 In forced auto mode, the unit will run with setting temperature 24. 8.10 Action of 4-way valve In cooling, drying, fan-only, or turning off mode, 4-way valve is off, while in heating mode 4-way valve is on. If the unit changes operation mode, 4-way valve will be delayed off 2 minutes after compressor stop. For defrosting, please refer to the passage defrosting mode. 8.11 Two speeds outdoor fan function stop. 8.11.1 Outdoor fan starts at the same time with compressor, but stops 30 seconds later after compressor 8.11.2 Outdoor fan action in heating mode(including heating in auto mode). outdoor temperature 17 15 low high outdoor fan speed outdoor temperature 22 20 high low outdoor fan speed Outdoor fan action in heating mode (including heating in auto mode). Outdoor fan action in cooling & drying mode (including cooling in auto & forced mode). 8.11.3 Outdoor fan action in cooling & drying mode(including cooling in auto & forced mode). Please refer to the pic. above. 8.12 Timer function 8.12.1 Timing range is 24 hours, and the minimum resolution is 15 minutes. 8.12.2 Timer on. After turning off, the machine will turn on automatically when reaching the setting time. 8.12.3 Timer off. After turning on, the machine will turn off automatically when reaching the setting time. 8.12.4 Timer on/off. After turning off, the machine will turn on automatically when reaching the setting on time, and then turn off automatically when reaching the setting off time. 8.12.5 Timer off/on. After turning on, the machine will turn off automatically when reaching the setting off time, and then turn on automatically when reaching the setting on time. 8.12.6 The tolerance of Timer is 1 minute per hour. 26
8.13 Sleep function mode 8.13.1 Operation time in sleep mode is 7 hours. After 7 hours the machine quits this mode and turns off. 8.13.2 In cooling, heating or auto mode sleep function is available. 8.13.3 Operation process in sleep mode is as follow: 1) After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode. 2) When cooling, the setting temperature rises 1(be lower than 30) every one hour, 2 hour later the rising stops and indoor fan is fixed as low speed. 3) When heating, the setting temperature descends 1(be lower than 30) every one hour, 2 hour later the descending stops and indoor fan is fixed as low speed, and anti-cold-wind is available. 8.13.4 If user uses timer on function in sleep mode, sleep function will pause and not resume until reaches the setting on time. 8.13.5 When user uses timer off function in sleep mode(or sleep function in timer off mode), if the timing time is less than 7 hours, sleep function will be cancelled when reaching the setting time. If the timing time is more than 7 hours, the machine will not stop until reaches the setting off time in sleep mode. 8.14 Auto-Restart function The indoor unit is equipped with auto-restart function. In case of a sudden power failure, the setting conditions before the power failure will be restored. The unit will resume the previous operation setting automatically after 3 minutes when power returns. 8.15 Ionizer function(optional) controller function. if indoor The indoor unit is equipped with Ionizer, which is controlled by the CLEAN AIR button on the remote when the unit is turned on. Press the CLEAN AIR button to activate the function. Press it again to stop the During the time when Ionizer being controlled by remote controller, Ionizer will be turned off automatically, fan stops running due to malfunctions or anti-cold-wind. When indoor fan restarts after malfunctions being eliminated and anti-cold-wind being released, Ionizer will be available again. 27
9. Troubleshooting supply, Safety Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down the power electricity power still are kept in capacitors, do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Bulb (25-40W) 28
9.1 Indoor Unit Error Display Display E0 E1 E5 E6 P0 P1 P2 P4 LED STATUS EEPROM parameter error Indoor / outdoor units communication protection Open or short circuit of outdoor temperature sensor Open or short circuit of room or evaporator temperature sensor Inverter module over-strong current protection Over voltage or too low voltage protection Temperature protection of compressor top. Inverter compressor drive error Note: E4 & P3: Reserved function 29
9.2 Diagnosis and Solution 9.2.1 E0(EEPROM parameter error) error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 9.2.2 E1(indoor / outdoor units communication protection) error diagnosis and solution Disconnect the power supply, after 1 minute, connect the power supply, turn on the unit with remote controller Does the unit work normally? NO Check the wiring between indoor and outdoor unit. Is the connection of L, N, S and GND good? Is the GND connection on outdoor PCB good? Yes Is the LED4 (red) on outdoor PCB bright and LED1(yellow) blinking? Yes NO Reconnect and retest again Replace indoor PCB and repower on. Is the failure cleared? No The power supply for outdoor PCB is fail. Check the wiring on outdoor PCB comparing with wiring plate. Is the connection good? Yes No Correct the connection. Replace outdoor e-box. 9.2.3 E5(Open or short circuit of outdoor temperature sensor) diagnosis and solution. Is the outdoor temperature sensor connector and connection good? NO Repair the connector and reconnect YES Replace the sensor and check if E5 display again? YES Replace outdoor e-box 9.2.4 E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution. 30
Is the indoor temperature and evaporator sensor connector and connection good? NO Repair the connector and reconnect YES Replace the sensor and check if E6 display again? YES Replace the indoor PCB 9.2.5 P0(Inverter module over-strong current protection) diagnosis and solution. Is all connections on PCB and between PCB and compressor good? NO Repair or correct the connector or connection. YES Replace the outdoor PCB and then repower on. Is the failure cleared? NO Check the compressor 9.2.6 P1(over voltage or too low voltage protection) diagnosis and solution. Is the power supply good? YES NO Be sure the power supply is normal when using the units Replace the outdoor e-box. 9.2.7 P2(temperature protection of compressor top) diagnosis and solution. 31
Does compressor operate? NO Is the connection good? NO Reconnect and retest. YES YES Is refrigerant circulation volume normal? Is protector normal? NO Replace the protector. NO YES Charge refrigerant Check the outdoor main PCB. Is there some problem? YES Is abnormality the same after gas charging? Replace the outdoor PCB. NO Check refrigerant system (such as clogging of capillary, etc) 9.2.8 P4(inverter compressor drive error) diagnosis and solution. Is the connection of compressor good? Is the wiring sequence right? The voltage range proper? NO Reconnect and retry YES Replace the outdoor E-box. If the problem comes to again, check coil resistance of inverter compressor, is it 0.452ohm? NO Replace inverter compressor 32
9.3 Key parts checking. 9.3.1. Compressor checking (Model: DA150S1C-20FZ) Measure the resistance value of each winding by using the multi-meter. Position Resistance Value Blue - Red 0.95Ω Blue - Black (20 ) Red - Blue 9.3.2 Outdoor Fan Motor (Model: YDK53-6N) Measure the resistance value of each winding by using the multi-meter. Red Position Black - Resistance Value 113Ω (20 ) -Yellow Red 113Ω (20 ) Red -Blue 193Ω (20 ) 33
9.3.4 Temperature Sensors. Room temp.(t1) sensor, Indoor coil temp.(t2) sensor, Outdoor coil temp.(t3) sensor, Outdoor ambient temp.(t4) sensor, Compressor exhaust temp.(te) sensor. Measure the resistance value of each winding by using the multi-meter. Some frequently-used R-T data for T1, T2, T3 and T4 sensor: Te mperature () 0 5 0 5 0 0 0 0 Re sistance Value (KΩ) 6.9 0.7 6.1 2.6 0.2.5.4 Te Some frequently-used R-T data for Te sensor: mperature ( ) 5 25 35 60 70 80 5 0 00 Re sistance Value (KΩ) 41.6 8 6.1 6.6 3.8.7.9.7 KΩ 34
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